单击超链接时，无法将字符串参数传递给正在调用的简单 Javascript 函数
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Unable to pass string parameter to a simple Javascript function being invoked when a hyperlink is clicked
提问by Bhavesh
It's a very simple question but I couldn't figure it out. I'm trying to pass parameters to a Javascript function which is invoked when a hyper link is clicked.
这是一个非常简单的问题，但我无法弄清楚。我正在尝试将参数传递给单击超链接时调用的 Javascript 函数。
It works just fine when the parameters are number but doesn't work when one of them is of type string. I even tried to escape them but unfortunately to no avail.
当参数是数字时它工作得很好，但当其中一个是字符串类型时不起作用。我什至试图逃避他们，但不幸的是无济于事。
The following is a very simple code.
下面是一段非常简单的代码。
function temp(a, b)
{
alert(a+ " "+b);
}
<a href="javascript:void(0);" onclick="temp(x, 2);">Click</a>
It doesn't work complaining x is undefinedxis here onclick="temp(x, 2);". When I modify the function something like this temp(1,2);, it works and alerts as specified.
x is undefinedx在这里抱怨是行不通的onclick="temp(x, 2);"。当我修改类似这样的函数时temp(1,2);，它会按照指定的方式工作并发出警报。
What might be the reason? What is the solution?
可能是什么原因？解决办法是什么？
回答by Tobias Krogh
you should avoid passing an undefined variable... xis only a variable as a string starts and end with double or single quotes
您应该避免传递未定义的变量...x只是一个变量，因为字符串以双引号或单引号开头和结尾
function temp(a, b) {
alert(a+ " "+b);
}
<a href="javascript:void(0);" onclick="temp('x', 2);">Click</a>
I also created a fiddleto show it works
我还创建了一个小提琴来展示它的工作原理
EDIT: this revision of the fiddle shows that you can also switch the quotes used in the markup... if you are used to double quotes for JS strings fiddle revision 1
编辑：小提琴的这个修订版表明您还可以切换标记中使用的引号...如果您习惯于对 JS 字符串使用双引号fiddle revision 1
回答by gdoron is supporting Monica
<a href="javascript:void(0);" onclick="temp('x', 2);">Click</a>
With your code, you treat xas it was a variable, while it wasn't decalred, surrond it with quotes.
使用您的代码，您将其x视为一个变量，而它没有被标记，用引号将其包围。
If you want to use the xvariable, declare it about the <a>:
如果要使用该x变量，请将其声明为<a>：
<script>
var x ="foo";
function temp(a, b) {
alert(a + " " + b);
}?
</script>
<a href="javascript:void(0);" onclick="temp(x, 2);">Click</a>
